The whistle-blowing website Wikileaks has begun releasing sensational information on the multi billion dollar global spying industry. The database contains hundreds of documents shining a light on the methods being used by secret services all over the world.

Here’s the video of Wikileaks founder Julian Assange speaking to journalists and students at a press conference at City University London in central London on December 1, 2011. Along with a number of other guest speakers, Mr Assange spoke of the Wikileaks ongoing investigation of surveillance software companies and their alleged use by governments around the world.